This reminds me of my mom wanting to get rid of some video games and giving them to me. She then changed her mind and left me a note saying that the games were "evil" and would "lead you further away from Jehovah". The note was shorter than this letter, but equally as creepy. Especially since we had all been playing those games for decades up until now.
Of course, for me it really was kind of annoying because she was worried I'd be 'tempted' to play the games rather than getting rid of them. If it weren't for my wife I would never have any dealings with my mom again in life. But it's the sort of thing that doesn't exactly inspire me to 'repent'. Knowing I won't be able to play Zelda at home without having a fight with the Mrs. over it is the last thing I need.
Anyway, yeah, you have to shut down. Since this sort of personal attack is going on, you really do have to just cut her off. Emotionally at least, and the rest is easy from there.
--sd-7